CCi was appointed by the tunnelling subcontractor as quantum expert and worked alongside the geotechnical expert to give an opinion on the losses incurred as a result of unforeseeable ground conditions. The set of arbitration was in Spain but the case involved a German geotechnical expert, a Spanish main contractor, a Brazilian arbitrator and an English subcontractor with no distinction as to what language the conditions of contract was governed by (Spanish or English). Case management and production of documents in various languages was an interesting challenge.